Improvement in machines for pointing horseshoe-nails



A. H. CARYL. Improvement .in Machines'for Pointing Horseshoe-Nails. ,N,0 114,920A Patente'd-MaylJSH.

UNITED STATES ALEXANDER H. CARYL, OF GROTON, MASSACHUSETTS.

IMPROVEMENT I MACHINES FOR POINTING HORSESHOE-NAILS.

.Specification forming part of Letters Patent No. 114,920, dated May 167 1871.

To all whom fit may concern:

Be it known that I, ALEXANDER H. CARYL, of Groton, in the county of Middlesex and State of Massachusetts, have invented an ImprovementinBevel-Pointin g Horseshoe-Nails 5 and I do hereby declare that the following,

taken in connection with the drawing which accompanies and forms part of this specication,

is a description of my invention sufficient to enable those skilled in the art to practice it.

In machine-made horseshoe-nails the points are generally left unchamfered, no hot-forged nails being, so far as I know, made with chamfered or beveled points.

My invention relates particularly to devices for chamfering the points of such horseshoe nails as are hot-forged and have no beveled points formed upon them in the operation of forging. Y

I use, in connection with two edges which form a tapering groove to receive the finished nail-shank, a rotary ring having internal burrteeth, the upper part of the ring projecting over the end of the groove, and having such position7 relatively to the nail-receiving groove, that, when the nail-shank is laidin said groove' and thrust endWise into and against the teeth of the ring, its point will be ground off or chamfered to the proper bevel.

The drawing represents, in plan and in vertical central section, a mechanism embodying the invention.

a denotes a rotary shaft, turning in suitable tively to the opposite face of the nail.

This ring overhangs the inner end of a nailv guide or rest, e, at one side of which is a shoulder, f, and on the other side a movable plate,

g, the space between the shoulder and the plate forming the groove for receiving the nail-shank, the bottom and sides of the groove keeping the nail-shank in position under the action of the rotating burr-teeth.

The rest or nail-supporting plate e is on the top of a shank-pin, h, and this pin is held in position by a set-screw, i, Working through a nnt-thread formed in a block, j, that sits between cheeks k, the nail-groove plate being 'adjusted in position as to height by the setscrews, and having shims drivenunder itwhen it is above the block.

Rapid rotation being given to the burr-ring, the nail to be bevel-pointed is laid in the groove and its point pushed into the ring,l v

when the position of the nail-rest will bring the point to the action of the teeth and cause the metal to be cut from the top of the nail, the edges or walls of the die-groove preventing the nail-shank from twisting. By this means the nails are rapidly and accurately pointed, the nail-rest extending up to the back part of the ring and to the angle of the back of the burr-teeth, so that the nail will be so operated upon as to form a chisel-point, Whilethe back of the nail-point is kept in a plane with the back of the nail-shank.

I claim- The combination of the rotary burr-ring and the nail-supporting rest and groove, the ring overhanging the nail-rest, and the supportingface of the rest projecting up to the angle of the burr-teeth, substantially as shown and described.

` ALEX. H. CARYL.

Witnesses:

A. H. OARYL, Jr., S. A.HAMLIN. 

